## Quantum Information

In quantum mechanics, **quantum information** is physical information that is held in the "state" of a quantum system. The most popular unit of quantum information is the qubit, a two-level quantum system. However, unlike classical digital states (which are discrete), a two-state quantum system can actually be in a superposition of the two states at any given time.

Read more about Quantum Information.

### Some articles on quantum information:

... and the co-founder and current director of the Institute for

**Quantum**Computing at the University of Waterloo ... Laflamme is currently a Canada Research Chair in

**Quantum Information**... Among his significant scientific works have been his work in

**quantum**computing and

**quantum information**theory ...

... There is nowadays a considerable interest in the field of

**quantum**theory for computational methods well-suited to the physics of many-body systems ... Considering the inherent difficulties of simulating general

**quantum**many-body systems, the exponential increase in parameters with the size of the system, and correspondingly, the high ... dealing with all the parameters used to fully characterize a

**quantum**many-body system is seriously impeded by the lavishly exponential buildup with the system size of the amount of variables ...

... Markus Aspelmeyer is an Austrian

**quantum**physicist ... and then, Junior, later Senior Researcher, at the Institute for

**Quantum**Optics and

**Quantum Information**(IQOQI) of the Austrian Academy of Sciences where he is leading a ... His research interests are

**quantum**entanglement and

**quantum**optics ...

...

**Quantum**coherence with a single Cooper pair "

**Quantum**Coherence with a Single Cooper Pair" ... "Coherent control of macroscopic

**quantum**states in a single-Cooper-pair box" ... "

**Quantum**-state engineering with Josephson-junction devices" ...

**Quantum Information**Theory

... The theory of

**quantum information**is a result of the effort to generalize classical

**information**theory to the

**quantum**world ...

**Quantum information**theory aims to investigate the following question What happens if

**information**is stored in a state of a

**quantum**system? One of the strengths of classical

**information**theory is that physical ... This is because it is always possible to efficiently transform

**information**from one representation to another ...

### Famous quotes containing the words information and/or quantum:

“*Information* networks straddle the world. Nothing remains concealed. But the sheer volume of *information* dissolves the *information*. We are unable to take it all in.”

—Günther Grass (b. 1927)

“The receipt to make a speaker, and an applauded one too, is short and easy.—Take of common sense *quantum* sufficit, add a little application to the rules and orders of the House, throw obvious thoughts in a new light, and make up the whole with a large quantity of purity, correctness, and elegancy of style.”

—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)